import ignore = require('ignore');
import { Tree } from '../generators/tree';
export declare function getIgnoreObject(root?: string): ReturnType<typeof ignore>;
/** One directory's ignore files, and the directory its patterns are rooted at. */
export type ScopedIgnoreMatcher = {
    /** Workspace-relative POSIX directory, `''` for the workspace root. */
    dir: string;
    /** How they relate is decided at build time - see `merge`. */
    matchers: ReturnType<typeof ignore>[];
};
/**
 * Resolves the ignore files that apply to a directory: its own and every one
 * above it, up to the workspace root.
 *
 * Ignore files cascade - a `.gitignore` covers its own directory and below, and
 * its patterns are relative to *itself*, not to the workspace root. Reading only
 * the root file, which is what `getIgnoreObject` does, silently misses every
 * nested one.
 *
 * A directory's answer is its own files plus its parent's, so every directory on
 * the way up is memoized rather than only the one asked for: sibling leaves
 * share the whole trunk, and a later walk stops at the first directory already
 * known.
 *
 * `read` decides where the files come from - `tree.read` for a generator, disk
 * for a caller with no tree - and returns an empty string or null when there is
 * no such file. Paths handed to it are workspace-relative POSIX.
 *
 * `merge` decides how the files *within one directory* relate, and the two
 * consumers genuinely need different rules:
 *
 * - `false` is prettier's: one matcher per file, any of them excluding wins, and
 *   a negation counts only if none excluded. `createIsIgnoredFunction` builds an
 *   ignorer per `--ignore-path` and ORs them, so a `!x` in `.prettierignore`
 *   cannot re-include an `x` that `.gitignore` excluded.
 * - `true` is git's and the native walker's: all files in one matcher, so
 *   `.nxignore`'s `!x` removes `.gitignore`'s exclusion of `x` outright. It has
 *   to be a merge rather than a precedence check between separate matchers,
 *   because a lone `!x` in its own matcher reports an opinion on `x/` but *none*
 *   on `x/a.ts` (measured), so the exclusion would still reach the children.
 *   The merge only removes the exclusion within that one directory - a negation
 *   in a nested file still loses to an ancestor's exclusion.
 *
 * When `merge` is true, `filenames` order matters: they go into one matcher in
 * order and the last matching pattern decides, so list them lowest-authority
 * first.
 */
export declare function createIgnoreChainResolver(read: (path: string) => string | null | undefined, filenames: string[], merge: boolean): (dir: string) => ScopedIgnoreMatcher[];
/**
 * True when the file is ignored, resolving the chain nearest file first.
 *
 * Each matcher is tested against the path relative to its own directory, which
 * is what makes a nested pattern like `/build` mean that directory's `build`
 * rather than the workspace's.
 *
 * Nearest directory with an *opinion* wins, not the first match: a nested
 * `!keep.log` must override the root's `*.log`, which is git's rule for files.
 * A nested negation of a *directory* does not reach its children - see the
 * `merge` note on `createIgnoreChainResolver`.
 *
 * How the files of one directory relate is decided when the chain is built - see
 * that same note. Here they are simply the entry's matchers: any one excluding
 * wins, and a negation counts only if none excluded.
 *
 * Two preconditions, neither enforced here:
 *
 * - `filePath` is workspace-relative POSIX and must sit under every `dir` in the
 *   chain, which holds when the chain came from that file's own directory.
 * - No ancestor directory of `filePath` may itself be ignored. git refuses to
 *   re-include a file inside an excluded directory, and this does not implement
 *   that rule: asked directly about `dist/keep.ts` with a root `dist/` and a
 *   nested `dist/.gitignore` holding `!keep.ts`, it answers "not ignored" where
 *   git says ignored (measured). A pruning walk like `visitNotIgnoredFiles`
 *   satisfies it by never asking about anything under `dist/`; a per-file
 *   caller cannot, so it goes through `createAncestorAwareIgnoreChecker`,
 *   which checks the ancestors before asking the chain.
 */
export declare function isIgnoredByChain(chain: ScopedIgnoreMatcher[], filePath: string): boolean;
/**
 * The chain's answers plus git's excluded-ancestor rule: nothing inside an
 * ignored directory can be re-included, so a nested negation must not
 * resurrect a file whose ancestor an outer file excluded - the case
 * `isIgnoredByChain` alone gets wrong (see its second precondition). The
 * oxfmt CLI follows the same rule (measured against 0.60.0: a scan skips a
 * nested `!keep.ts` under a root-ignored `dist/`), so every per-file caller -
 * the cascading tree checkers and the disk-backed resolver in
 * `formatters/oxfmt.ts` - goes through here.
 *
 * A directory's own ignore files cannot un-ignore the directory itself, so
 * its verdict comes from its parent's chain - probed with a trailing slash,
 * which is what makes a directory-only pattern like `dist/` match. Verdicts
 * are memoized per directory, so a batch of files shares its ancestor walks.
 */
export declare function createAncestorAwareIgnoreChecker(resolve: (dir: string) => ScopedIgnoreMatcher[]): TreeIgnoreChecker;
/**
 * Directories that should never be walked, whatever the workspace's own ignore
 * files say - `node_modules`, `.git`, the nx caches.
 *
 * The list comes from the native walker rather than a second copy here, so a
 * filesystem walk and a tree walk cannot drift apart.
 *
 * Checked ahead of the cascading chain rather than folded into it: these are not
 * re-includable, and as ordinary patterns a nested negation could resurrect
 * `node_modules`.
 */
export declare function isAlwaysIgnored(path: string): boolean;
/**
 * A chain's answers as predicates over workspace-relative POSIX paths.
 *
 * Files and directories are asked separately because the answers differ: a
 * pattern is only directory-only if it ends in a slash, and `ignore` will not
 * match `dist/` against the path `dist`. Callers must not have to know that, so
 * the slash is appended inside and never leaves this module.
 */
export type TreeIgnoreChecker = {
    isIgnoredFile: (path: string) => boolean;
    isIgnoredDirectory: (path: string) => boolean;
};
/**
 * What git ignores, which is also what the native walker ignores.
 *
 * `.nxignore` outranks `.gitignore` - `walker.rs` registers it with
 * `add_custom_ignore_filename` - which a merge with `.nxignore` last reproduces.
 * git itself does not read it.
 *
 * Reads from the tree rather than disk because a generator can create or amend
 * an ignore file in the same run, which would leave the on-disk copy stale.
 */
export declare function createGitIgnoreChecker(tree: Tree): TreeIgnoreChecker;
/**
 * What prettier ignores: the workspace root only, and one ignorer per
 * `--ignore-path` ORed rather than merged (both measured), so a `!` in
 * `.prettierignore` cannot re-include what `.gitignore` excluded. That is the
 * CLI `nx format:check` shells out to.
 *
 * Not an exact match for that command: `isAlwaysIgnored` is wider than
 * prettier's built-ins, and `format.ts` filters its own patterns through
 * `.nxignore`, which this does not read.
 *
 * Reads from the tree rather than disk, as above.
 */
export declare function createPrettierIgnoreChecker(tree: Tree): TreeIgnoreChecker;
/**
 * What oxfmt ignores: prettier's two files, but resolved from each file's own
 * directory upwards rather than the workspace root - measured against the
 * oxfmt 0.60.0 CLI, which differs from prettier on exactly that axis. Still
 * one matcher per file rather than merged.
 *
 * A config's `ignorePatterns` is not an ignore file and is not read here;
 * `formatFilesWithOxfmt` applies it rooted at that config's directory.
 */
export declare function createOxfmtIgnoreChecker(tree: Tree): TreeIgnoreChecker;
/**
 * Exported, unlike git's and prettier's, because oxfmt has two consumers:
 * this tree-backed checker and the disk-backed resolver in
 * `formatters/oxfmt.ts`. A shared value is the only thing that keeps them
 * agreeing, so do not restate these three anywhere.
 *
 * `satisfies` rather than an annotation keeps the values literal - an
 * annotation widens `cascade` and `merge` to `boolean` (measured in the
 * declaration emit).
 */
export declare const OXFMT_IGNORE_OPTIONS: {
    filenames: string[];
    cascade: true;
    merge: false;
};
/**
 * `path.dirname` for the workspace-relative POSIX paths the chain is keyed by,
 * except that the workspace root is `''` rather than `.` - that is the key
 * `createIgnoreChainResolver` terminates on.
 */
export declare function posixDirname(relativePath: string): string;
/**
 * Adds an entry to a .gitignore file if it's not already covered by existing patterns.
 * Creates the file if it doesn't exist.
 */
export declare function addEntryToGitIgnore(tree: Tree, gitignorePath: string, entry: string): void;